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When posting your question please:- Choose the correct forum for your message. Posting a VB.NET question in the C++ forum will end in tears.
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Insults, slap-downs and sarcasm aren't welcome. Let's work to help developers, not make them feel stupid.
cheers,
Chris Maunder
The Code Project Co-fou
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Hi , I am just trying to reverse all the words of a string at their place only ex if there is a string : "vandana is a good girl" then the out put of the program should be "anadnav is a doog lrig" for that i have created a package to calculate the no of words in the string and also for calculating reverse of a string that pacage is:
package p1;
public class meth
{
public int cal(String s)
{
int wrd=0;
for(int i=0;i<s.length();i++)
{
char c=s.charAt(i);
if(Character.isWhitespace(c))
{
wrd++;
}
}
return wrd+1;
}
public String rev(String b)
{
String p="";
for(int i=0;i<b.length();i++)
{
p=b.charAt(i)+p;
}
return p;
}
}
-----------------------------------------------------------------And the code of my program is :
import p1.*;
import java.io.*;
class rv
{
public static void main(String args[]) throws IOException
{
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);
System.out.println("Enter your string :");
String s=br.readLine();
meth ob=new meth();
int n=ob.cal(s);
String m="";
while(n>=0)
{
for(int i=0;i<s.lenght();i++)
{
char c=s.charAt(i);
if(Character.isWhitespace(c))
{
String p=s.substring(0,i);
meth ob1=new meth();
String sb=ob1.rev(p);
m=m+" "+sb;
s=s.substring(i+1,s.length());
}
}
n--;
}
System.out.println(m);
}
}
but the problem is my program gives different different out put and it's not working well and i've tired  to understand th problem.
-- modified 2 days ago.
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Why make it so complicated? Just read the string and then loop through the characters in reverse order and print each one. You will end up with the string reversed.
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i need to reverse the spelling of words and need not to change their order i.e dog is an animal out should be: god si na lamina .if i use for loop then then the whole string get it'sreverse.
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Then all you need to do is split the string at each wordbreak (e.g. space) and then do the same to each word.
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yeah same i was doing in my code can you please take a look of it
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As I suggested earlier, it can be simplified considerably by using the Scanner class, as in the following sample. If you do not wish to use the scanner, then you could write your own class that splits a string into a collection of tokens.
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner("Cotta and Balbus love the sweet voices of the girls");
while (sc.hasNext())
{
String nextWord = sc.next();
char c;
for (int i = nextWord.length() - 1; i > -1; --i)
{
c = nextWord.charAt(i);
System.out.print(c);
}
System.out.print(" ");
}
System.out.println(".");
}
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Take a look at the Scanner class[^], which can help in the breaking up of words.
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I want java code for fetch the details from my ms access database and those details are run in my program to excute the code.....
-- modified 2 days ago.
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Guyss i need just code for fetch details from msaccess database...
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Hi guys , I do need help , cause i'm no a develloper but i have to do program on java that will read .txt file from database and get a specific String(FERME):
10/04/13 06:46 PS : 16 PN 239-Km 359.4 L.V K.ANI PN239 L/V: FERME
10/04/13 06:46 PS : 16 PN 239-Km 359.4 L.V 8V CdV C.J : 08.8 V
the file is made of multiple line like above, i just need to check if the file hade the word FERME....
thank you for your help
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If that is all you need to do then it would be faster just to run the FIND command. However if there is more to it than that, and you are sure that you need a Java program, then you need to learn The Java Language[^] and the Basic I/O classes[^].
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hello,
can any1 tell me how to develop a port scanner in java.I am not asking d entire code but atleast can any1 gimme an idea where 2 start from.
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hello,
can any1 tell me how to develop a port scanner in java.
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Google[^]
We can't do a lot for you if you don't give more details...
I will never again mention that Dalek Dave was the poster of the One Millionth Lounge Post, nor that it was complete drivel.
How to ask a question
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I want to create a jquery dialog box which onlick of a image it has to load the dynamic page data and display. currently iam writing the code as below but its not working.
var history = function(value, rowIndex) {
var id = this.grid.getItem(rowIndex).ID;
return "<img src=/img/showimg.jpg width=20 height=20 id=button1">";
};
<script>
$(function() {
$( "#dialog" ).dialog({
autoOpen: false,
show: {
effect: "blind",
duration: 1000
},
hide: {
effect: "explode",
duration: 1000
}
});
$( "#button1" ).click(function() {
$( "#dialog" ).dialog( "open" );
});
});
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If I know
String IP = "127.0.0.1";
int port = 2020;
how an I estbish connection fomone client to this one in java Socket Programming.
I hae tried
Socket s = SocketFactory.getDefault().createSocket("localhost", Integer.parseInt(port));// sf = new SocketFactory;
but it is throwing exception.
Please help
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The address "127.0.0.1" is the loopback address of your own PC, so you will need another program running there that is listening on that port. See http://docs.oracle.com/javase/tutorial/networking/sockets/[^] for the correct way to do it.
In future please do not just say "it is throwing exception. Please help". Provide the exact code that is failing, and full details of the exception or other error message.
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Hi
Here i am posting my code that i have written
package com.evora.practice.swing;
import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.filechooser.FileNameExtensionFilter;
public class PhotoViewer {
public static void main(String args[]){
new Main();
}
}
class ImageDraw extends Canvas{
/**
*
*/
private static final long serialVersionUID = 1L;
BufferedImage img;
double radian=0.0;
Dimension ds;
int iw;
int ih;
int x;
int y;
int adjX;
int adjY;
int adjW;
int adjH;
int mX;
int mY;
int orWidth;
int orHeight;
boolean rotate;
HashMap imgFiles;
String filename;
int curImgIndex;
ImageDraw(){
ds=getToolkit().getScreenSize(); //get the screen size
mX=(int)ds.getWidth()/4; //half of the screen width
mY=(int)ds.getHeight()/4; //half of the screen height
filename=null; //initialize filename variable
rotate=false; //initialize rotate variable
//initialize variables used to increase or decrease photo size
adjX=0;
adjY=1;
adjW=1;
adjH=1;
}
public void paint(Graphics g){
if(filename!=null){
if(rotate) //show rotated photo
rotateImage(g);
else
showImage(g); //show normal and zoom photo
}
}
//The rotateImage rotates the photo in clockwise or counterclockwise
//direction based on the radian value
public void rotateImage(Graphics g){
Graphics2D g2d=(Graphics2D)g;
g2d.translate(mX,mY); //move the original coordinate to point(mX,mY)
g2d.rotate(radian); //rotate the photo
g2d.translate(-iw/2,-ih/2); //move the coordinate back to point (iw/2,ih/2)
g2d.drawImage(img,0,0,iw,ih,null);//show the rotate photo
g2d.dispose(); //clean the g2d object
rotate=false; //reset the rotate to false after the photo rotates
}
//Increase the radian value by Math.PI/2
//so the photo is rotated in clockwise direction
public void rotateClockwise(){
radian+=Math.PI/2;
}
//Decrease the radian value by Math.PI/2
//so the photo is rotated in countclockwise direction
public void rotateCounterClockwise(){
radian-=Math.PI/2;
}
//The showImage method has code to display the photo when it is in
//normal view or zoom view
public void showImage(Graphics g){
Graphics2D g2d=(Graphics2D)g;
g2d.translate(x,y);
g2d.drawImage(img,0,0,iw,ih,null);
g2d.dispose();
}
public void readImage(String filename){
try{
//read the photo file so it is ready to display
img=ImageIO.read(new File(filename));
//get the original width and height of the photo
orWidth=img.getWidth();
orHeight=img.getHeight();
//Make sure the photo is not too large to fit the screen
if(mX40 && ih>40){
adjX+=10;
adjY+=10;
adjW-=20;
adjH-=20;
setImageBounds();
}
}
//The storeImages method is invoked when the user select the Open... sub-menu
//item from the program interface
//It displays a file chooser dialog for multiple files selection
//The selected photos file are stored in a HashMap object imgList for
//later show
public void storeImages(){
imgFiles=new HashMap();
JFileChooser chooser = new JFileChooser("C:\\Users\\Public\\Pictures\\Sample Pictures\\");
FileNameExtensionFilter filter = new FileNameExtensionFilter("Images", "jpg", "gif","png","bmp");
chooser.setFileFilter(filter);
chooser.setMultiSelectionEnabled(true);
int returnVal = chooser.showOpenDialog(this);
if(returnVal == JFileChooser.APPROVE_OPTION) {
File[] Files=chooser.getCurrentDirectory().listFiles();
for( int i=0;i getImgFiles(){
return imgFiles;
}
}
//The Main class represents the interface of the PhotoView program
//On the interface, you see a File menu that has two sub-menu items: Open..., and Exit
//When the photo is displayed, the program will display a panel that contains
//all buttons you need to rotate, zoom, move, and play the slideshow of the photos
class Main extends JFrame implements ActionListener{
/**
*
*/
private static final long serialVersionUID = 1L;
JButton btrotateClockwise;
JButton btrotateCounterClockwise;
JButton btZoomIn;
JButton btPrevious;
JButton btNext;
JButton btZoomOut;
JButton btSlideShow;
JPanel panel;
ImageDraw imgDraw;
boolean stop=true;
ImageSlide Slider;
Main(){
setTitle("Photo Viewer");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setExtendedState(this.getExtendedState() | JFrame.MAXIMIZED_BOTH);
setBackground(Color.CYAN);
JMenuBar mainmenu=new JMenuBar();
JMenu menu=new JMenu("File");
JMenuItem mopen=new JMenuItem("Open...");
mopen.setMnemonic(KeyEvent.VK_O);
mopen.addActionListener(this);
JMenuItem mexit=new JMenuItem("Exit");
mexit.setMnemonic(KeyEvent.VK_X);
mexit.addActionListener(this);
menu.add(mopen);
menu.add(mexit);
mainmenu.add(menu);
setJMenuBar(mainmenu);
btrotateClockwise=new JButton("ROTATE RIGHT");
btrotateClockwise.setBackground(Color.GREEN);
btrotateClockwise.addActionListener(this);
btrotateCounterClockwise=new JButton("ROTATE LEFT");
btrotateCounterClockwise.setBackground(Color.YELLOW);
btrotateCounterClockwise.addActionListener(this);
btZoomIn=new JButton("ZOOMIN");
btZoomIn.setBackground(Color.MAGENTA);
btZoomIn.addActionListener(this);
btZoomOut=new JButton("ZOOMOUT");
btZoomOut.setBackground(Color.PINK);
btZoomOut.addActionListener(this);
btPrevious=new JButton("BACK");
btPrevious.setBackground(Color.ORANGE);
btPrevious.addActionListener(this);
btNext=new JButton("NEXT");
btNext.setBackground(Color.GRAY);
btNext.addActionListener(this);
btSlideShow=new JButton("PLAYALL");
btSlideShow.setBackground(Color.WHITE);
btSlideShow.addActionListener(this);
panel=new JPanel();
panel.setLayout(new FlowLayout());
panel.add(btrotateClockwise);
panel.add(btrotateCounterClockwise);
panel.add(btZoomIn);
panel.add(btZoomOut);
panel.add(btNext);
panel.add(btPrevious);
panel.add(btSlideShow);
panel.setBackground(Color.BLACK);
add(panel, BorderLayout.SOUTH);
imgDraw=new ImageDraw();
add(imgDraw,BorderLayout.CENTER );
setVisible(true);
panel.setVisible(false);
}
//*handling buttons and sub-menu items clicks
public void actionPerformed(ActionEvent e){
if(e.getSource()==btrotateClockwise)
{
imgDraw.rotate=true;
imgDraw.rotateClockwise();
imgDraw.repaint();
}
else if(e.getSource()==btrotateCounterClockwise)
{
imgDraw.rotate=true;
imgDraw.rotateCounterClockwise();
imgDraw.repaint();
}
else if(e.getSource()==btZoomIn)
{
imgDraw.zoomIn();
imgDraw.repaint();
}
else if(e.getSource()==btZoomOut)
{
imgDraw.zoomOut();
imgDraw.repaint();
}
else if(e.getSource()==btPrevious)
{
imgDraw.movePrevious();
}
else if(e.getSource()==btNext)
{
imgDraw.moveNext();
}
else if(e.getSource()==btSlideShow)
{
if(stop){
startClick();
}
else{
stopClick();
}
}
else{
JMenuItem source = (JMenuItem)(e.getSource());
if(source.getText().compareTo("Open...")==0)
{
imgDraw.storeImages();
imgDraw.moveFirst();
panel.setVisible(true);
}
else if(source.getText().compareTo("Exit")==0)
System.exit(0);
}
}
//The stopClick method invoked when you click the Pause button
//*to stop the slideshow
public void stopClick(){
btSlideShow.setIcon(new ImageIcon("playall.png"));
stop=true;
Slider.stopShow();
}
//The startClick method invoked when you click the Play button
//to start the slideshow
public void startClick(){
btSlideShow.setIcon(new ImageIcon("pause.png"));
stop=false;
Slider=new ImageSlide();
Slider.start();
}
//The ImageSlide class handle the photo slideshow process
//When you click the Play button the run method of this class is invoked
//When you click the Pause button the stopShow method of this class is invoked
class ImageSlide extends Thread{
boolean started;
HashMap map;
ImageSlide(){
started=true;
map=imgDraw.getImgFiles();
}
public void run(){
int i;
try{
for(i=0;i<map.size();i++)
{
if(started!=false){
Thread.sleep(1000); //time interval between each photo show
imgDraw.moveNext(); //show the next photo
}
}
stopClick(); //stop show when all photos are displayed
imgDraw.moveFirst(); //show the first photo again
}catch(InterruptedException ie){System.out.println("Interrupted slide show...");}
}
public void stopShow(){
started=true;
}
}
}
when ever i am executing this program & pressing the PlayAll button getting some exception like NullPointerException. Can anyone tell me why i am getting this type of exception over here?And what is the Solution?
Thanks in Advance.
Ajitesh.
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- Please edit the above and use the code button to put <pre> tags around your code so it is readable.
- Show us the line in the code where the error occurs.
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java.lang.ClassNotFoundException: Could not load requested class : com.mysql.jdbc.driver .
This is coming while executing..I have also updated the buildpath by hibernate jars & mysql connector bin jar.still it is not working
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